Conference Paper


Conference: National Seminar on Ecology and Enviroment, Volume: Special Issue


Seaweeds or marine macro-algae are important renewable plant resources occurring in the seas, brackish waters and lagoons across the globe. Application of liquid extract from these organisms as foliar spray and/or seed treatment showed positive result on enhancement of vegetative growth and yield of several crops. In addition they increase the biochemical constituents of plants and possess environmental stress mitigating potential. Amendment of seaweed liquid fertilizer (SLF) to soils improves the soil health by enhancing the micronutrient quantity and quality, and microbial activity. The research work carried out so far on the beneficial role of SLF in agriculture has been reviewed. The seaweed resources of the Indian coast and the methods so far followed for preparation of SLF and their mode of application to crops is presented.

    • "The diluted liquid seaweed extract has also been reported to enhance plant defence against disease and increases salt index (Jayaramanetal, 2011). The presence of adequate amount of natural growth promoting hormones and micronutrients in seaweed sap makes them an excellent fertilizer (Mohanty et al., 2013).Unlike chemical fertilizer, seaweed derived products are biodegradable, non toxic, non polluting and non hazardous to human, animals and birds (Dhargal kar and Pereira, 2005). Liquid seaweed fertilizer is a unique combination of macronutrients, especially K and trace elements, polysaccharides and sugars that are in disssolved form (Mondal et al., 2015).Present investigation was undertaken with the objective to find out the efficacy of seaweed saps (Kappaphycus alvarezii , Gracilaria edulis) forenhancingth eproductivityo fmaizeunderrain fedsituation. "
    [Show abstract] [Hide abstract]
    ABSTRACT: A field experiment conducted in the research farm of Birsa Agricultural University, Ranchi (JH) during kharif 2012-13 and 2013-14 with maize variety HQPM-1 in a randomized block design and replicated thrice, with two sources of seaweed sap namely Kappaphycus alvarezii and Gracilaria edulis at 6 concentrations (0.0, 2.5,5.0, 7.5,10.0 and 15.0% )with 100%RDF (150:60:40 kg N,P2O5 andK2O ha-1) and 4 concentrations (0.0, 7.5, 10.0 and 15%) with 50 % RDF,revealed that application of either 7.5% K sap or 5% G sap along with 100% RDF enhanced the grain yield by 34 and 30% respectively than application of 100% RDF alone (41.92 q ha-1). Application of 7.5% either of K sap or G sap along with 50% RDF produce similar grain yield (38.42 and 38.83 q ha-1 respectively) as that with 100% RDF alone and thereby saving 50% fertilizer need of the crop as well as maintained grain quality. Productivity of maize variety “HQPM-1” can be enhanced by more than 30% by the application of either 7.5%K sap or 5% G sap along with 100%RDF and can also save 50% fertilizer need of maize production with 50%RDF.
    No preview · Article · Oct 2015
  • [Show abstract] [Hide abstract]
    ABSTRACT: Macroscopic marine algae, popularly known as seaweeds, form one of the important living resources of the ocean. Seaweeds form an important renewable resource in the marine environment and have been a part of human civilization from time immemorial. Reports on the uses of seaweeds have been cited as early as 2,500 years ago. Seaweed utilization for a variety of purposes has led to the gradual realization that some of their constituents are more superior and valuable in comparison to their counterparts on land. Seaweeds synthesize a wide range of chemicals, some of which are the only natural resources of agar, carrageenan, and alginate. These have been used as food for human beings, feed for animals, natural biofertilizers for plants and source of various chemicals like pharmaceutical values without any side effects, production of biodiesel and wastewater management, etc. In this chapter, utilization of seaweeds has been obviously discussed which are proving and playing a crucial role in sustainable development to became a promising source for human welfare.
    No preview · Chapter · Jan 2015